On the phase transformation zinc blende to wurtzite

Frey, Friedrich; Jagodzinski, H. und Steger, G. (1986): On the phase transformation zinc blende to wurtzite. In: Bulletin de Mineralogie, Vol. 109, No. 1-2: pp. 117-129

Abstract

The transformation ZnS(3C) rt arrow ZnS(2H) was studied by XRD in powders and in single-crystals of different origins. A well established transformation behaviour was found in powders, but a more or less hindered 3C rt arrow 2H transformation in single crystalline material. Almost faultless ZnS(3C) crystals undergo no transformation. The prehistory of the sample (growth conditions, T-time-treatment) is of essential importance, but chemical impurities (<1\%) are of minor importance. The transformation is first order, heterogeneous, athermal and irreversible in a thermodynamic sense and may be described by a nucleus formation process out of faulted regions and a subsequent nucleus growth process determined by other factors. Polytypic variants are realized in sequences >1000 A thick and may be imagined as ’dead ends’ of statistical structural fluctuations.-J.M.H.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 550 Earth sciences and geology
• Language: English